Documentary Tracing News Today

Somehow became substituted for the original flag. where is the original flag? >> reporter: the documentary tracing the flag from the original owners to many who believe they had contact with it. the films director says the documentary is not only about the mystery of the flag but what it represents. >> that sense of unity, that sense of how we felt in those days and weeks after 9/11, and thats really something that weve also lost. >> reporter: the film not only trying to recapture that feeling b...

>> reporter: an iconic image that became the symbol of american resolve. >> that was quite a picture. whoever thought of taking it at that time and firefighters doing it performed like a tremendous sf service to the country. >> reporter: in the weeks and months to come americans saw what they thought was the 9/11 flag raised at the world series and on battleships in the middle east but it wasnt as revealed in a cnn documentary. >> we knew right away it was the wrong flag. >> this is another flag...

Original flag. where is the original flag? >> the documentary tracing the flag from the original owners to those who believed they had contact with it. the documentary is only about the mystery of the flag, but what is represented. >> the unity, and how we felt in thois days and weeks is something else we lost. >> they tried to help put an end to the mystery. cnn received credible tips, but sofa none have led to the authentic patriotic symbol of that fateful day. >> jason carol reporting, but we...